Household appliance control method and device and household appliance

Abstract

The invention provides a household appliance control method and device and a household appliance. The household appliance comprises a photosensitive element. The control method comprises the following steps: acquiring working parameters of the photosensitive element when the household appliance works; determining the wire diameter of the particulate matter according to the variable quantity of the working parameters of the photosensitive element; according to the wire diameter of the particulate matter, determining the physical attribute of the particulate matter; and controlling the household appliance to work according to the physical attribute of the particulate matter. According to the method, the physical attribute of the particulate matter is obtained through the variable quantity of the working parameters of the photosensitive element caused by shielding of the particulate matter on the photosensitive element when the household appliance works, and the household appliance is controlled to work according to the physical attribute of the particulate matter, so that the recognition capability of the household appliance on the particulate matter can be improved; therefore, the household electrical appliance can take more targeted measures for the particulate matters, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of household electrical appliances, and in particular to a control method and device for household electrical appliances, and the household electrical appliances. Background Art

[0002] With the increasing demand for household cleaning, home appliances such as vacuum cleaners and dust mite removers have been widely integrated into daily life. These devices usually have the function of detecting the concentration of particles (such as dust, dust mites, dander, sand, fiber, plant debris, ash, etc.). By real-time monitoring of the concentration of particles in the working area, the machine automatically adjusts the working parameters to better absorb the particles.

[0003] However, existing household appliances are usually unable to perform more comprehensive and accurate detection of particulate matter, such as the specific types of particulate matter, the number of each type, etc., and are unable to perform targeted adsorption of particulate matter. The performance of household appliances needs to be improved. Summary of the invention

[0004] The present application provides a control method and device for household electrical appliances and the household electrical appliances, which have high detection accuracy.

[0005] The present application provides a control method for a household appliance, wherein the household appliance includes a photosensitive element; the control method includes:

[0006] Acquire the working parameters of the photosensitive element when the home appliance is working;

[0007] Determining the linear diameter of the particles according to the change in the working parameters of the photosensitive element;

[0008] Determining the physical properties of the particles according to the linear diameter of the particles;

[0009] The operation of the household appliance is controlled according to the physical properties of the particulate matter.

[0010] Optionally, the obtaining of the working parameters of the photosensitive element when the home appliance is working includes:

[0011] Obtaining working parameters of the photosensitive element at multiple moments;

[0012] The step of determining the linear diameter of the particles according to the change in the working parameters of the photosensitive element comprises:

[0013] Determining the first-order derivative of the operating parameter of the photosensitive element at each time;

[0014] According to the corresponding relationship between the first-order derivative of the working parameter and the linear diameter of the particle, the linear diameter of the particle at each moment is determined respectively.

[0015] Optionally, determining the physical properties of the particles according to the linear diameter of the particles includes:

[0016] Determining the relative speed of the particles according to the change in the working parameters of the photosensitive element;

[0017] Determining the mass of the particle according to the relative speed of the particle and the linear diameter of the particle;

[0018] The physical properties of the particles are determined according to the linear diameter of the particles and the mass of the particles.

[0019] Optionally, determining the relative speed of the particle according to the change in the working parameter of the photosensitive element includes:

[0020] The relative speed of the particles is determined according to the second-order derivative of the working parameter of the photosensitive element.

[0021] Optionally, before determining the relative speed of the particles according to the change in the working parameters of the photosensitive element, the control method further includes: linearly arranging the linear diameters of the particles according to the sizes of the linear diameters of the particles.

[0022] Optionally, after determining the physical properties of the particles based on the wire diameter of the particles and the mass of the particles, the control method of the household appliance further includes: summarizing and calculating the quantities of the physical properties of different particles and storing them separately, and periodically sending them to the screen of the household appliance for screen display or periodically uploading them to the cloud.

[0023] Optionally, determining the physical properties of the particles according to the linear diameter of the particles and the mass of the particles includes:

[0024] Determining the type of the particle according to the linear diameter of the particle and the mass of the particle;

[0025] According to the types of particles at each moment, the number of each type of particles is determined.

[0026] Optionally, determining the relative speed of the particle according to the change in the working parameter of the photosensitive element includes:

[0027] determining the actual speed of the particle according to the change in the working parameter of the photosensitive element;

[0028] The relative speed of the particles is determined according to the air flow rate of the clean duct in the household appliance and the actual speed of the particles.

[0029] The present application provides a computer-readable storage medium having a program stored thereon, and when the program is executed by a processor, the control method of the household appliance described in any one of the above items is implemented.

[0030] The present application also provides a control device for a household appliance, comprising one or more processors, for implementing any of the control methods for the household appliance described above.

[0031] The present application provides a household appliance, including:

[0032] photosensors; and

[0033] The control device as described above is electrically connected to the photosensitive element.

[0034] In some embodiments, the physical properties of the particles are obtained by measuring the change in the working parameters of the photosensitive element caused by the blocking of the photosensitive element by the particles when the household appliance is working. The operation of the household appliance is controlled based on the physical properties of the particles, which can improve the household appliance's ability to recognize the particles, enable the household appliance to take more targeted measures against the particles, and enhance the user experience.

[0035] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] Figure 1 Shown is a partial circuit diagram of an embodiment of the household appliance of the present application.

[0038] Figure 2 Shown Figure 1 Another partial circuit diagram of the household appliance is shown.

[0039] Figure 3 Shown is a flow chart of an embodiment of a method for controlling a household appliance of the present application.

[0040] Figure 4 FIG. 1 is a schematic diagram showing a voltage of port AD0 according to an embodiment of the present application.

[0041] Figure 5 Shown is a structural block diagram of an embodiment of a control device for household electrical appliances of the present application. DETAILED DESCRIPTION

[0042] The present application provides a control method, device and home appliance of a household appliance. The control method, device and home appliance of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0043] Figure 1 Shown is a partial circuit diagram of an embodiment of the household appliance of the present application. Figure 1 The circuit diagram of the light source emitting part of the household appliance for particle detection is shown. The household appliance includes a photosensitive element and a control device 13, and the control device 13 is electrically connected to the photosensitive element. Figure 1 In the embodiment shown, the photosensitive element is a light emitting diode D1. The non-inverting input terminal of the operational amplifier 11 is connected between the resistor R10 and the resistor R11. The inverting input terminal of the operational amplifier 11 is connected to the resistor R8.

[0044] When the power supply terminal VDD1 is powered on, the current passes through R10 and R11 and reaches the ground terminal GND. The voltage drop of the resistor R11 is input to the positive input terminal of the operational amplifier 11, and the output terminal of the operational amplifier 11 outputs a high-level signal, driving the transistor Q1 to turn on. The current of the power supply terminal VDD1 passes through the diode D1, the transistor Q1, and the resistor R8 and flows into the ground terminal GND. The voltage drop of the resistor R8 is fed back to the inverting input terminal of the operational amplifier 11 and connected to the port AD2 of the control device 13. The operational amplifier 11 controls the output signal of the output terminal by comparing the voltage drop of the resistor R11 with the voltage drop of the resistor R8, so that the diode D1 maintains a constant operating current. The control device 13 adjusts the output voltage of the port AD2, thereby adjusting the operating current of the diode D1.

[0045] Figure 2 Shown Figure 1 Another partial circuit diagram of the household appliance is shown. Figure 1 The figure shows the circuit schematic diagram of the light source receiving part of the household appliance for particle detection. Figure 2 In the illustrated embodiment, the photosensitive element is a phototransistor Q5.

[0046] When the power supply terminal VDD1 is powered on, the current passes through R23 and R22 and reaches the ground terminal GND. The voltage drop of the resistor R22 is input to the positive input terminal of the operational amplifier 12. The current of the power supply terminal VDD1 passes through the transistor Q5 and the resistor R7 and reaches the ground terminal GND. The resistor R7 generates a voltage drop, and the control device 13 collects the voltage drop of the resistor R7 through the port AD0. The internal resistance of the phototransistor Q5 changes with the change of the intensity of the light source detected by it, and accordingly, the voltage drop of the resistor R7 changes accordingly. Therefore, the intensity of the light source detected by the phototransistor Q5 can be inferred by the voltage drop of the resistor R7. The voltage drop of the resistor R7 is collected by the inverting input terminal of the operational amplifier 12 through the capacitor C2 and the resistor R4. The operational amplifier 12 compares the voltage drop of the resistor R7 with the voltage drop of the resistor R22, and controls the output terminal to output the corresponding signal. The output signal of the output terminal of the operational amplifier 12 is collected by the control device 13 through the port AD1.

[0047] When the power supply terminal VDD1 is powered on, in order to ensure that the light intensity that the phototransistor Q5 can detect is within the appropriate working range, the voltage drop of the resistor R7 (i.e., the voltage of the port AD0) should be within the appropriate working range. In some embodiments, the appropriate working range of the voltage drop of the resistor R7 is ±5mv. The control device 13 detects the voltage of the port AD0 in real time and compares it with the pre-stored appropriate working range. If the voltage of the port AD0 is less than the minimum voltage value of the appropriate working range, the voltage of the control port AD2 is reduced, and the working current of the diode D1 is reduced, so that the intensity of the light received by the transistor Q5 is reduced, the internal resistance of the transistor Q5 is reduced, the voltage drop of the resistor R7 is increased, and the voltage of the port AD0 is increased, thereby entering the appropriate working range. If the voltage of the port AD0 is greater than the maximum voltage value of the appropriate working range, the voltage of the control port AD2 is increased, and the working current of the diode D1 is increased, so that the intensity of the light received by the transistor Q5 is increased, the internal resistance of the transistor Q5 is increased, the voltage drop of the resistor R7 is corrected, and the voltage of the port AD0 is reduced, thereby entering the appropriate working range. In this way, the intensity of the light source that can be detected by the phototransistor Q5 can be adjusted so that it works under appropriate conditions.

[0048] When detecting particles, particles passing through the phototransistor Q5 block the light source received by the phototransistor Q5, causing a voltage change at the port AD0. Therefore, particles can be detected based on the voltage change at the port AD0.

[0049] Figure 3 Shown is a flow chart of an embodiment of a method 20 for controlling a household appliance of the present application.

[0050] The method 20 for controlling a household appliance includes steps 21 to 24 .

[0051] Step 21, obtaining the working parameters of the photosensitive element when the home appliance is working.

[0052] The working parameter of the photosensitive element may be at least one of voltage, current, resistance, and power. The working parameter of the photosensitive element may be obtained through port AD0. When the home appliance is working, the voltage value of port AD0 is obtained in real time as the working parameter of the photosensitive element. The control device 13 includes an AD conversion function, which can convert the collected analog voltage value into a digital value for subsequent analysis.

[0053] Step 22, determining the linear diameter of the particles according to the change in the working parameters of the photosensitive element.

[0054] When the household appliance is working, if there is no dust or other particles, the light intensity emitted by the light-emitting diode D1 and the light intensity received by the phototransistor Q5 are stable. When there are particles, the particles block the light source, causing the light intensity received by the phototransistor Q5 to change, resulting in changes in the working parameters of the phototransistor Q5. Particles with different wire diameters cause different changes in the working parameters of the phototransistor Q5. Particles with larger wire diameters block the light source more, and the light intensity received by the phototransistor Q5 is smaller, causing greater changes in the working parameters such as the voltage of the phototransistor Q5. Therefore, according to the changes in the working parameters of the photosensitive element, the wire diameter of the particles can be determined. Specifically, the corresponding relationship between the change in the working parameters and the wire diameter of the particles can be pre-stored, and the detected change in the working parameters can be substituted into the corresponding relationship to obtain the corresponding wire diameter value. The corresponding relationship between the change in the working parameters and the wire diameter of the particles can be obtained through experiments or experience.

[0055] Step 23, determining the physical properties of the particles according to the linear diameter of the particles.

[0056] The physical properties of particles include type, volume, mass, etc. Based on the particle diameter, more comprehensive physical properties of particles can be obtained, thereby more accurately identifying particles.

[0057] Step 24, controlling the operation of the household electrical appliances according to the physical properties of the particles.

[0058] After determining the physical properties of the particles, the home appliance is controlled to work according to the physical properties. According to the physical properties, more targeted operations can be performed on the particles. For example, if the particle diameter is large and the mass is large, the home appliance can be controlled to adopt a higher power suction to better absorb the particles.

[0059] In some embodiments, the physical properties of the particles are obtained by measuring the change in the working parameters of the photosensitive element caused by the blocking of the photosensitive element by the particles when the household appliance is working. The operation of the household appliance is controlled based on the physical properties of the particles, which can improve the household appliance's ability to recognize the particles, enable the household appliance to take more targeted measures against the particles, and enhance the user experience.

[0060] In some embodiments, step 21 includes: obtaining the working parameters of the photosensitive element at multiple moments; step 22 includes: determining the first-order derivative of the working parameters of the photosensitive element at each moment; and determining the linear diameter of the particle at each moment according to the correspondence between the first-order derivative of the working parameter and the linear diameter of the particle.

[0061] Figure 4 The figure shows a schematic diagram of an embodiment of the voltage of the port AD0 of the present application, wherein the horizontal axis is time, in ms, and the vertical axis is the voltage of the port AD0, in mV.

[0062] When particulate matter is detected in home appliances, the number of particles is usually large. Figure 4 In the figure, the working parameter of the photosensitive element is voltage, and points B, C, D, and E represent the detection of particles. Before point A, the voltage of port AD0 remains unchanged, indicating that the light intensity detected by the photosensitive element remains unchanged. Between points A and B, the voltage of port AD0 changes, indicating that the light intensity detected by the photosensitive element changes, and the change is caused by the first particle. After point B, if there are no other particles, the voltage of port AD0 should return to the same voltage as before point A, but the voltage changes to point C, indicating that the second particle is detected. Particles of different diameters cause different voltage changes. Therefore, the diameter of the particles at each moment can be determined by the first-order derivative of the voltage at each moment, that is, the rate of change of the voltage. The corresponding relationship between the first-order derivative of the working parameter and the diameter of the particle can be obtained through experiments or experience. When the household appliance is working, the first-order derivative of the working parameter of the photosensitive element is substituted into the corresponding relationship to obtain the corresponding diameter of the particle. Substituting the first-order derivative of the working parameter at each moment into the corresponding relationship can obtain the diameter of the particle at each moment.

[0063] In some embodiments, step 23 includes: determining the relative speed of the particles based on the change in the working parameters of the photosensitive element; determining the mass of the particles based on the relative speed of the particles and the linear diameter of the particles; determining the physical properties of the particles based on the linear diameter of the particles and the mass of the particles.

[0064] The household appliance includes a clean duct for circulating air. By adjusting the air flow rate, the adsorption power of the particles can be adjusted. The relative speed of the particles refers to the speed of the particles relative to the air. When the particles pass through the monitoring area of ​​the photosensitive element, the shielding of the light source is related to the relative speed of the particles. Therefore, the relative speed of the particles can be determined by the change in the working parameters of the photosensitive element. In some embodiments, the relative speed of the particles is determined by the corresponding relationship between the change in the working parameters of the photosensitive element and the relative speed of the particles.

[0065] In some embodiments, determining the relative speed of the particle according to the change in the working parameter of the photosensitive element includes: determining the relative speed of the particle according to the second-order derivative of the working parameter of the photosensitive element.

[0066] Taking voltage as an operating parameter as an example, the second-order derivative of the operating parameter, that is, the rate of change of the voltage change rate, is related to the speed of the particles passing through the photosensitive element. Therefore, the relative speed of the particles can be determined by the second-order derivative of the operating parameter. Specifically, the linear diameter of the particles can be determined first based on the first-order derivative of the operating parameter, and then the relative speed of the particles can be determined based on the first-order derivative of the linear diameter.

[0067] In some embodiments, before determining the relative speed of the particles according to the change in the working parameters of the photosensitive element, the control method 20 further includes: linearly arranging the linear diameters of the particles according to the sizes of the linear diameters of the particles.

[0068] After obtaining the linear diameter of the particles, the linear diameter of the particles can be arranged linearly by using methods such as the bubble algorithm. The second-order derivative of the arranged data is calculated to determine the relative speed of the particles. After the linear diameter of the particles is arranged linearly, the data is arranged according to the numerical value, which makes it easier to derive the second-order derivative.

[0069] In some embodiments, determining the relative speed of the particles based on the change in the working parameters of the photosensitive element includes: determining the actual speed of the particles based on the change in the working parameters of the photosensitive element; determining the relative speed of the particles based on the air flow rate of the clean duct in the household appliance and the actual speed of the particles.

[0070] The change in the working parameter of the photosensitive element is caused by the actual speed of the particle. The actual speed of the particle is obtained according to the change in the working parameter of the photosensitive element. Specifically, the actual speed of the particle can be obtained according to the corresponding relationship between the change in the working parameter of the photosensitive element and the actual speed of the particle, or a mathematical model.

[0071] The air velocity of the clean duct in the household appliance is a known parameter. The relative velocity of the particles can be obtained by the difference between the actual velocity of the particles and the air velocity.

[0072] After determining the relative speed and diameter of the particles, the mass of the particles can be estimated using the principles of momentum and kinetic energy.

[0073] In some embodiments, the movement trajectory of the particle and the change in the actual velocity are used to infer the force exerted on the particle, thereby estimating the mass of the particle.

[0074] In other embodiments, the density of the particle is inferred from the particle's trajectory and diameter, and then its volume is calculated using the density and diameter of the particle. The mass of the particle is estimated by assuming that the particle is a sphere or cylinder with uniform density.

[0075] After determining the particle diameter and mass, the physical properties of the particle, such as the type of particle, can be further inferred, thus enabling a more comprehensive and accurate identification of the particle.

[0076] In some embodiments, determining the physical properties of the particles based on the linear diameter of the particles and the mass of the particles includes: determining the type of the particles based on the linear diameter of the particles and the mass of the particles; and determining the number of each type of particles based on the type of the particles at each moment.

[0077] Different types of particles such as hair, dandruff, mites, and fluff have different diameters and masses. Compare the diameter and mass of the particles with the diameters and masses of various types of particles stored in advance to find the type to which the particles belong. Specifically, the diameter and mass of each type of particle have a certain range. If the data of the particle to be compared falls within the diameter range and mass range of a certain type, the particle to be compared is considered to belong to that type. Alternatively, the particle to be compared is considered to belong to the type that is closest to its diameter and mass. After determining the type of particle at each moment, count each type to obtain the number of particles of each type. In this way, not only the type of particle can be identified, but also the number of each type of particle can be identified, and household appliances can be controlled to adsorb different particles in a more targeted manner.

[0078] In some embodiments, after determining the physical properties of the particles based on the wire diameter and the mass of the particles, the control method 20 of the household appliance further includes: summarizing and calculating the quantities of the physical properties of different particles and storing them separately, and periodically sending them to the screen of the household appliance for screen display or periodically uploading them to the cloud.

[0079] After determining the physical properties of each particle, further classify and summarize the particles according to their physical properties. Count the number of particles with similar or identical physical properties. For example, count the total number of particles within a certain size range and mass range. This helps to quickly understand the distribution of particles in the current environment.

[0080] The aggregated physical property data is stored in the device’s internal memory, so that it can be retained for subsequent analysis or display even when the home appliance is not connected to the Internet.

[0081] The home appliance includes an LED (Light Emitting Diode) screen or an LCD (Liquid Crystal Display) screen. The home appliance will periodically send these aggregated physical property data to its screen for display. For example, when the home appliance is working, the physical properties of the particles are displayed in real time based on the detected particles. In this way, the user can directly understand the particle status in the current environment through the device screen, including which sizes of particles are more, which mass ranges of particles are dominant, etc.

[0082] In addition to the screen display, the physical property data of the particles can be uploaded to the cloud server regularly. This allows users to remotely access and view the data, and the cloud can run more complex algorithms to analyze the data, providing deeper insights and suggestions, which can be used for long-term analysis and research.

[0083] In some embodiments, the working parameters of the acquired photosensitive elements are grouped, for example, 50 working parameters are grouped into one group and stored in a queue. For the data in the queue, the first-order derivatives are calculated respectively to obtain the linear diameters of multiple particles; the linear diameters of multiple particles are arranged in a bubble pattern, and the first-order derivatives are calculated to obtain the actual speeds of multiple particles; the relative speeds of multiple particles are determined according to the air flow rate and the actual speed of the cleaning pipe of the household appliance; the physical properties (such as quality, type, and quantity) of the particles are determined according to the linear diameters and relative speeds of the particles; the working state of the household appliance is controlled according to the physical properties of the particles, such as adjusting the power of the household appliance to perform targeted adsorption treatment on different particles. In this way, the household appliance can identify particles more comprehensively and accurately, improve the cleaning efficiency, enhance the performance of the household appliance, and enhance the user experience.

[0084] Figure 5 Shown is a structural block diagram of an embodiment of a control device for household electrical appliances of the present application.

[0085] like Figure 5As shown, the control device of the household appliance includes one or more processors 31, which are used to implement the control method 20 of the household appliance as described above.

[0086] In some embodiments, the control device may include a computer-readable storage medium 32, which may store a program that can be called by the processor 31 and may include a non-volatile storage medium. In some embodiments, the control device may include a memory 33 and an interface 34. In some embodiments, the control device may also include other hardware according to actual applications.

[0087] The computer-readable storage medium 32 of the embodiment of the present application stores a program thereon, and when the program is executed by the processor 31, it is used to implement the control method 20 of the household appliance described above.

[0088] The present application may take the form of a computer program product implemented on one or more computer-readable storage media 32 (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing program code. The computer-readable storage medium 32 includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be a computer-readable instruction, a data structure, a module of a program, or other data. Examples of computer-readable storage media 32 include but are not limited to: phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassette, tape disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

Claims

1. A method for controlling a household appliance, characterized in that: The household appliance includes a photosensitive element; the control method includes: Acquire the working parameters of the photosensitive element when the home appliance is working; Determining the linear diameter of the particles according to the change in the working parameters of the photosensitive element; Determining the physical properties of the particles according to the linear diameter of the particles; The operation of the household appliance is controlled according to the physical properties of the particulate matter.

2. The control method of household electrical appliances according to claim 1, characterized in that: The step of obtaining the working parameters of the photosensitive element when the home appliance is working includes: Obtaining working parameters of the photosensitive element at multiple moments; The step of determining the linear diameter of the particles according to the change in the working parameters of the photosensitive element comprises: Determining the first-order derivative of the operating parameter of the photosensitive element at each time; According to the corresponding relationship between the first-order derivative of the working parameter and the linear diameter of the particle, the linear diameter of the particle at each moment is determined respectively.

3. The control method of household electrical appliances according to claim 1, characterized in that: Determining the physical properties of the particles according to the linear diameter of the particles includes: Determining the relative speed of the particles according to the change in the working parameters of the photosensitive element; Determining the mass of the particle according to the relative speed of the particle and the linear diameter of the particle; The physical properties of the particles are determined according to the linear diameter of the particles and the mass of the particles.

4. The control method of household electrical appliances according to claim 3, characterized in that: The determining the relative speed of the particles according to the change in the working parameter of the photosensitive element comprises: The relative speed of the particles is determined according to the second-order derivative of the working parameter of the photosensitive element.

5. The control method of household electrical appliances according to claim 3, characterized in that: Before determining the relative speed of the particles according to the change in the working parameter of the photosensitive element, the control method further comprises: linearly arranging the linear diameters of the particles according to the sizes of the linear diameters of the particles; and / or, After determining the physical properties of the particles based on the wire diameter of the particles and the mass of the particles, the control method of the household appliance further includes: summarizing and calculating the quantities of the physical properties of different particles and storing them separately, and periodically sending them to the screen of the household appliance for screen display or periodically uploading them to the cloud.

6. The method for controlling household electrical appliances according to claim 3, characterized in that: The determining the physical properties of the particles according to the linear diameter of the particles and the mass of the particles includes: Determining the type of the particle according to the linear diameter of the particle and the mass of the particle; According to the types of particles at each moment, the number of each type of particles is determined.

7. The method for controlling household electrical appliances according to claim 3, characterized in that: The determining the relative speed of the particles according to the change in the working parameter of the photosensitive element comprises: determining the actual speed of the particle according to the change in the working parameter of the photosensitive element; The relative speed of the particles is determined according to the air flow rate of the clean duct in the household appliance and the actual speed of the particles.

8. A computer-readable storage medium, characterized in that: A program is stored thereon, and when the program is executed by a processor, the control method of the household appliance described in any one of claims 1 to 7 is implemented.

9. A control device for household electrical appliances, characterized in that: The invention comprises one or more processors, and is used to implement the control method of the household appliance according to any one of claims 1 to 7.

10. A household appliance, characterized in that: include: Photosensitive element; and The control device as claimed in claim 9, electrically connected to the photosensitive element.

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